Most popular questions and responses by JB
  1. physics

    A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the drawing. As the station rotates, an astronaut in chamber A is moved 1.99 102 m along a circular arc. How far along a circular arc is an astronaut in

    asked on April 4, 2016
  2. statistics

    about 13% of the population is nervous around strangers. If 2 people are randomally seclected, what is the probability that both are nervous around strangers?

    asked on January 21, 2012
  3. chemistry

    An aqueous solution of cobalt(II) nitrate has a concentration of 0.471 molal. The percent by mass of cobalt(II) nitrate in the solution is %.

    asked on August 21, 2014
  4. Algebra

    A total of 475 tickets were sold for the school play. There were 75 fewer student tickets sold than adult tickets. How many adult tickets were sold?

    asked on November 13, 2009
  5. Math

    A baseball player hits a ball up in the air with an upward velocity of 18 ft/sec. The equation that gives the height of the ball at any time "t" is h(t) = -8t(t) + 18t +5. How long did it take for the ball to hit the ground? Sorry I don't know how to type

    asked on November 9, 2017
  6. College Physics

    A block weighing 70.0 N rests on a plane inclined at 25.0° to the horizontal. A force F is applied to the object at 50.0° to the horizontal, pushing it upward on the plane. The coefficients of static and kinetic friction between the block and the plane

    asked on October 9, 2012
  7. math

    Prize winners for a giveaway program are to be determined as follows: Envelopes for the first 500 entries will be numbered 1 through 500 and laid on a long table. The first official will walk along the table, opening all the envelopes. The second official

    asked on February 2, 2019
  8. English

    “Nature is bountiful, which is why logging should be strictly regulated.” Which logical fallacy is illustrated in this sentence? A. Ad hominem B. Non sequitur C. Post hoc ergo propter hoc D. Red herring

    asked on March 7, 2015
  9. math

    A mathematics teacher wishes to use groups of 5 and/or 7 students for a class assignment. When she tries to make assignments she notices that it cannot be done with the number of students she has. However, if the number of students were any larger, the

    asked on February 2, 2019
  10. chem

    Calculate the amount of heat required to raise the temperature of a 65-g sample of water from 32∘C to 65∘C. (The specific heat capacity of copper is 4.184 J/g∘C.) Q=M*C*delta T 65g*4.184*(65-32) 89.7 J

    asked on January 31, 2016
  11. math

    What is the shortest length of cable that can be cut into either a whole number of 18-ft pieces or a whole number of 30-ft pieces?

    asked on February 2, 2019
  12. Math

    jeff has 12 more toy cars than toy trucks. In all, he has 19 toy vehicles. How many toy trucks does Jeff have?

    asked on January 23, 2017
  13. Rational Zeros

    List all possible rational zeros for the polynomial below. Find all real zeros of the polynomial and factor f(x)=2x^4+19x^3+37x^2-55x-75

    asked on January 2, 2012
  14. College Physics

    A rifle bullet with a mass of 17.5 g traveling toward the right at 293 m/s strikes a large bag of sand and penetrates it to a depth of 23.6 cm. Determine the magnitude and direction of the friction force (assumed constant) that acts on the bullet.

    asked on October 9, 2012
  15. Math

    jeff has 12 more toy cars than toy trucks. In all, he has 19 toy vehicles. How many toy trucks does Jeff have?

    asked on January 24, 2017
  16. math

    Sarah bought 2 boxes of pencils. There were 58 pencils in each box. In the first box, 23 of the pencils were red, 18 were blue, and the rest were yellow.

    asked on December 1, 2016
  17. precalc

    Solve the logarithmic equation for x. (Enter your answers as a comma-separated list.) log2(x + 17) − log2(x − 2) = 1 2 is the base for the log.

    asked on March 7, 2016
  18. public speaking

    Demographics is important to know your: A. speech. B. topic. C. audience. D. location of speaking event.

    asked on December 20, 2014
  19. physics

    A ball is thrown straight upward and then returns to the earth. choosing the positive direction to be upward, sketch a graph of the velocity of this ball against time. where does the velocity change direction? Explain?

    asked on February 24, 2011
  20. Living Environment

    having a hard time finding this information on google and i really need help for some questions. What are 3 abiotic factors that influence the: Highlands of Ethiopia Patagonia The Rockies Pakistan and the Himalayas Forests of Eastern China

    asked on November 8, 2011
  21. physics

    A 58.2 g object is attached to a horizontal spring with a spring constant of 11.8 N/m and released from rest with an amplitude of 24.4 cm. What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless?

    asked on February 24, 2014
  22. precalculus

    which conic section is this the equation for? 3x^2 - 9x + 2y^2 = 15

    asked on December 6, 2009
  23. College Algebra

    Verify the function f and g, are inverses of each other by showing that f(g(x))=x and g(f(x))=x Graph the functions. f(x)=6/(1-x) g(x)=(1-6/x)

    asked on January 3, 2012
  24. Functions/End behavior

    f(x)=x^2(x^2-2)(x+2) Determine the end behavior, find the power function that the graph of f resembles for large values of |x| Find the maximum number of turning points

    asked on January 2, 2012
  25. science

    Can someone explain to me using a formula, why an increase in carbon dioxide makes the blood more acidic.

    asked on April 28, 2010
  26. bio

    the systemtic system of the heart sends oxygenated blood and nutrients to all body cells. If the questions were does it send oxygenated blood and nutrients to all body tissue would the answer be yes or no. cells make tissues so would it be yes?

    asked on February 1, 2010
  27. precalculus

    the vertex of y^2 - 8y + 24 = x is... (9,3) (24,0) (8,4) (4,8) or none of these

    asked on December 6, 2009
  28. physics

    It has been suggested that rotating cylinders about 12 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall

    asked on November 21, 2009
  29. Chemistry

    Hi there. I'm doing a paper on Biology (yes I know, will explain the chem link in a sec) and in it am trying to find the best pH level for Slaters, using limewater and filtered water to change concentrations. I have done experiments and using bunch of

    asked on May 7, 2008
  30. Medical

    It was discovered that a medical assistant discussed the medical condition of a high-profile individual in public. This resulted in the condition becoming publicized information. What were the influential factors in this situation for the medical

    asked on January 23, 2008
  31. Trig

    (Tan^2 x) - 2 tan x - 3 / tan x + 1

    asked on March 5, 2017
  32. AP Physics

    A car traveling in a straight line has a velocity of 3.24 m/s at some instant. After 3.28 s, its velocity is 8.18 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2 .

    asked on November 6, 2015
  33. English

    Which sentence most clearly exhibits bias? A. The professor’s points appear to be based on outdated research. B. If my argument is true, Blake’s argument is clearly false. C. Few would disagree that poor people are incapable of rational thinking. D.

    asked on March 7, 2015
  34. Chemistry

    what are the pH and the pOH of 0.125M HCIO4?

    asked on April 4, 2012
  35. Math

    A stone is thrown skyward from the top of building. The distance in feet between the stone and the ground in 't' seconds is given by the function h (t) = -16t(t) -4t+ 442. How long after the stone is thrown is it 430 feet from the ground? Sorry I don't

    asked on November 9, 2017
  36. math

    if m set of 22 mathematics teachers and p is the set of 25 physics teachers and if 2 teachers both mathematics and physics, how many elements has MUP.

    asked on July 5, 2016
  37. precalc

    Solve the equation. (Enter your answers as a comma-separated list.) 5x^2e^(−2x) − 3x^3e^(−2x) = 0

    asked on March 15, 2016
  38. chemistry

    How many grams of NiI2 are there in 263 grams of an aqueous solution that is 33.5 % by weight NiI2.

    asked on August 21, 2014
  39. chemistry

    How many grams of NaOH are there in 187 grams of an aqueous solution that is 7.06 % by weight NaOH.

    asked on August 21, 2014
  40. Business

    Which of the following statements about the money invested in a traditional IRA account is correct? A.it isn't taxed until it's withdrawn. B.it's subject to double taxation. C.it's taxed as you make deposits. D.it isn't taxed.

    asked on November 21, 2013
  41. Physics

    How can you tell which force diagrams have a strong normal force and which ones have a weak normal force?

    asked on September 24, 2012
  42. math

    solve for sine theta of 3.14/3

    asked on March 21, 2012
  43. Chemistry

    I'm trying to figure out the formula for one liter of 1M K2HPO4 (Potassium Phosphate Dibasic). I know the amount of K2HPO4 is 174.18grams and you make it to equal one liter with dH2O, but I can't find where anyone has actually written the amount of dH2O to

    asked on June 6, 2011
  44. history

    how has "liberty and justice for all" changes from 1492 to 1865? may include race, class, religion, politics, gender, economics, culture

    asked on May 9, 2011
  45. physics

    a rock is dropped from the top of diving platform into the swimming pool below. will the distance traveled by the rock in a 0.1 second interval near the top of the flights be the same as the distance covered in a 1.1 second interval just before it hits the

    asked on February 24, 2011
  46. chemistry

    when you add manganese dioxide to hydrogen peroxide does the temperature decrease or does it form a precipitate?

    asked on September 24, 2010
  47. English

    What are the predicate adjectives in this sentence? The charmer must remain calm as the cobra flares its hood menacingly.

    asked on October 22, 2009
  48. Language

    Are these two sentences complete or incomplete? A large red fox with its young. A day sunbathing on the beach.

    asked on August 22, 2009

    4. REVIEW: Let f(x) = 2^x and g(x) = √(x − 7). Find and simplify completely. a. )( f(3+h)-f(3) )/8h b.) (g ◦ f)(5) / (f ◦ f)(3)

    asked on March 26, 2016
  50. precalc

    Solve the equation. (Enter your answers as a comma-separated list. Round your answers to four decimal places.) 2^x − 8(2^−x) + 2 = 0

    asked on March 15, 2016
  51. precalc

    2^(3x + 1) = 3^(x − 2) (a) Find the exact solution of the exponential equation in terms of logarithms.

    asked on March 7, 2016
  52. physics

    how do you plot T2 2.14, 2.10, 2.08, 2.03, 2,20 and 2.30 and length .445, .54m, .497m, .50m, .53m and .555m on a graph and how do you find the gradient

    asked on October 25, 2015
  53. grammar

    directions: rewrite the 2 sentences as 1 sentence by combining the main verbs and helping verbs...The carriage has crossed the bridge. The carriage has arrived at the mansion.

    asked on December 10, 2013
  54. physics

    if the reaction time is 10.0s, how far will the car travel before hitting the brakes? Vf = 27.42 m initial speed = 80 km/hr coefficient of friction = 1.00

    asked on June 25, 2012
  55. AAT


    asked on April 8, 2012
  56. Functions of f(x)

    Given the two functions f(x)and g(x)‚0 for all x, explain how to find (f+g)(x),(f-g)(x),(f*g)(x), and (f€g)(x).Demonstrate examples for all: f(x)=(-x)/(6)-3(5+3x)/(8)-3x f(0)=-15/8

    asked on January 1, 2012
  57. literature

    summarize the major similarities and differences between the forms of drama, poetry, and the short story. Demonstrate your ideas with textual examples from the course readings. In your response, include at least one example of each literary form.

    asked on March 22, 2011
  58. Science

    how long does it take for one water molecule to complete the water cycle?

    asked on March 7, 2011
  59. english

    Where should the commas be placed in this sentence? Players came from places such as Red Hill Pennsylvania and Popular Point Manitoba Canada.

    asked on January 20, 2010
  1. English

    Who else is gonna fail the 8th grade

    posted on April 29, 2019
  2. ELA


    posted on January 7, 2019
  3. Language Arts urgent!!


    posted on September 17, 2018
  4. Language Arts

    Part A: A Part B: B 2: C Typing Question:???? 4: C 5: B 6: B 7: B 8: A Typing Question:???? If you go to my school you cannot get help on the typing questions because you have to compare your independent reading selection!! 100/100 I Prommise....!

    posted on December 4, 2017
  5. Taylor


    posted on September 1, 2016
  6. physics


    posted on August 31, 2015
  7. English

    All of these are ways to correct comma splices, run-ons, and fused sentences except A. join two independent clauses with a coordinating conjunction. B. separate the two clauses with a period. C. join two independent clauses with a subordinating

    posted on January 12, 2015
  8. algebra

    x=150 electric tower

    posted on December 15, 2014
  9. science pls help

    are these the correct answers

    posted on October 13, 2014
  10. Public speaking

    no 2 is B

    posted on April 29, 2014
  11. public speaking

    D is wrong

    posted on April 29, 2014
  12. grammar

    The carriage has crossed the bridge and arrived at the mansion. The carriage crossed the bridge and has arrived at the mansion. ???

    posted on December 10, 2013
  13. Business HELP!!!

    Number 8 is D

    posted on November 22, 2013
  14. Physics

    please help me if you can. I have no values, just diagrams. the first diagram: a box is attached to a rope and pulled along a floor with the rope parallel to the floor. The second diagram: a box is attached to a rope and pulled along a floor with the rope

    posted on September 25, 2012
  15. Physics

    well I have 3 diagrams and I'm supposed to rank them in order of strongest normal force to weakest normal force, so I'm just not sure how to tell which is the strongest.

    posted on September 24, 2012
  16. AAT

    those are supposed to be square root symbols. I'm not sure what happened...

    posted on April 8, 2012
  17. Chemistry

    Thank you so much! Another question, the directions say, Determine the [H3O] and [OH] of each of the following solutions. Lime Juice, pH= 1.9 Kitchen Cleaner, pOH= 4.75 Tomato Juice, pH= 4.23 How do I do this?

    posted on April 4, 2012
  18. Chemistry

    I think i figured it out, would the pH be .9?

    posted on April 4, 2012
  19. Chemistry

    hi DrBob222, thanks for your help. I understand that part, but how do you solve it using only the molarity?

    posted on April 4, 2012
  20. statistics


    posted on November 15, 2011
  21. history

    thanks really just trying to get my thesis statement straightened out its a very broad subject

    posted on May 9, 2011
  22. English

    Casual Wear is popular with American teenagers for sure.

    posted on March 30, 2011
  23. Science

    Thank you, J-B-

    posted on March 7, 2011
  24. Science

    please delete my question

    posted on March 7, 2011
  25. Science and acrostic poems

    ooo ya

    posted on January 26, 2011
  26. english

    Thank you for your help.

    posted on January 20, 2010
  27. Algebra

    Great explanation. I totally get it now. I think I can actually finish the rest. Thanks for your help!

    posted on November 13, 2009
  28. PreCalc (Just Can't Comprehend)

    If P = 2x + 2y and xy=400, then the perimeter is P(x)=2x + 800/x. In a pre-calc course you could only be expected to find the minimum value of P(x) by inspection of a graph. See the "graph of p = 2x + 800/x from 0 to 40" at wolfram alpha. OR, by creativity

    posted on November 5, 2009
  29. English

    Calm Thank you for your help

    posted on October 23, 2009
  30. Physics EM

    Physics2212 students... lets all protest against mastering physics.

    posted on October 20, 2009
  31. science


    posted on April 14, 2009
  32. social studies

    Britain I believe

    posted on May 7, 2008